727 questions

Hey guys hoping someone can shed some light on a couple of questions. I'm switching over to auto from 4 speed and I'm not up on auto equipped cars. Found a real nice 727 at swap meet that I'm going to tackle a rebuild job on. The guy I got it from said it came out of a early 70's motorhome with a 360 but he wasn't sure what year. How can I determine what year it is so I can make sure I order the right year rebuild kit. He also said it had a weighted converter. I'm going to go with about a 2800 stall. Being that the old one was weighted what do I need to do about that? It's going to be a street strip use. What's a good rebuild kit. I want the toughest stuff because I'm abusive. Thanks guys